Christopher Nolan continues to fill out the Insterstellar cast with actors just outside his usual stable. Topher Grace is in talks to join Matthew McConaughey, Anne Hathaway, Jessica Chastain, and Michael Caine in Nolan’s newest film, which remains shrouded in secrecy. All we (still) know is its previously reported space-and-time-travel aspect, which is based on Caltech physicist Kip Thorne’s work, and will “depict a heroic interstellar voyage to the farthest borders of our scientific understanding.” That voyage will now have 100-percent more Topher Grace. Presumably Grace's role will involve some sort of sarcastic wisecracking and asking a lot of questions.